Air compressor



FIG. 1 is a top, rear and right side perspective view of an air compressor showing my new design;

FIG. 2 is a top, front and right side perspective view thereof;

FIG. 3 is a right side elevational view thereof, the undisclosed left side being a mirror image of that shown; and

FIG. 4 is a front elevational view thereof. 

The ornamental design for an air compressor, as shown and described. 